Flowserve 510si Series Digital Positioner User Manual

Page 15

User Instructions Logix 510si - LGENIM0510-0

2 12/13

12 TROUBLESHOOTING LOGIX 510SI DIGITAL POSITIONERS

Failure

Probable Cause

Corrective action

No LED is blinking

1. Current source below 3.6 mA
2. Incorrect wiring polarity

1. Verify current source is outputting at least 3,6 mA
2. Check wiring for correct polarity

Unit does not respond
to analog commands

1.Error occurred during calibration

1. Correct calibration error. Recalibrate

Valve position reading is
not what is expected

1. Stroke not calibrated
2. Stem position sensor mounting
is off 180 degrees

1. Recalibrate
2. Orient sensor properly

Position is driven fully
open or closed and will
not respond to command

1. Stroke not calibrated

1. Calibrate valve stroke

2. Inner-loop hall sensor not connected

2. Verify hardware connections

3. Wrong air action set on DIP switch

3. Check ATO (Air-to-open) and ATC

(Air-to-Close) settings. Recalibrate

4. Actuator tubing backward

4. Verify ATO/ATC actuator tubing

5. Electro-pneumatic converter

5. Replace electro-pneumatic converter

malfunctioning

Sticking or hunting
operation of the posi-
tioner

1. Contamination of the electro-
pneumatic converter.

1. Check air supply for proper ﬁltering
and meeting ISA specifcations ISA-7.0.01

2. Control gain set too high

2. Lower gain switch settings

The version number of the embedded code may be checked at any time except during a calibration by holding down the

Δ but-

ton. This will not alter the operation of the unit other than to change the blink sequence to 3 blinks indicating the major version
number. Holding the

∇ button will give the minor version number without affecting operation. The version codes are interpreted

by adding up the numbers assigned according to the following table:

For example if holding the

Δ button gave a G-G-R code, and holding the ∇ button gave a Y-Y-G code then the resulting

version number would be (0+0+2).(9+3+0) or version 2.12.

Color

First blink value

Second blink value

Third blink value

Green

Yellow

Red

11 VERSION NUMBER CHECKING